749489463649 has 2 divisors, whose sum is σ = 749489463650. Its totient is φ = 749489463648.

The previous prime is 749489463631. The next prime is 749489463797. The reversal of 749489463649 is 946364984947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 583592100624 + 165897363025 = 763932^2 + 407305^2 .

It is a cyclic number.

It is not a de Polignac number, because 749489463649 - 2⁵ = 749489463617 is a prime.

It is a super-2 number, since 2×749489463649² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (747489463649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374744731824 + 374744731825.

It is an arithmetic number, because the mean of its divisors is an integer number (374744731825).

Almost surely, 2^749489463649 is an apocalyptic number.

It is an amenable number.

749489463649 is a deficient number, since it is larger than the sum of its proper divisors (1).

749489463649 is an equidigital number, since it uses as much as digits as its factorization.

749489463649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128701952, while the sum is 73.

The spelling of 749489463649 in words is "seven hundred forty-nine billion, four hundred eighty-nine million, four hundred sixty-three thousand, six hundred forty-nine".